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cs_preprocess

Langue: en

Version: 2009-02-04 (ubuntu - 24/10/10)

Section: 1 (Commandes utilisateur)

NAME

cs_preprocess - Code_Saturne preprocessor

SYNOPSIS

cs_preprocess -m <file> [-sc] [options]

DESCRIPTION

Code_Saturne preprocessor reads meshes from several formats. It enables non-conforming joining and periodicity handling, as well as some postprocessing for mesh checking.

OPTIONS

-m, --mesh <file>
Preprocessor input mesh file (mesh file format determined automatically by filename extension or forced by -format sub-option)
-sc, --sim-comm
simulate messages without file output

General options

--cwd <directory>
working directory (if different from current directory)
-h, --help
Print a usage message and exit.
-i, --in [<file>]
Command line completed by a file (default file: standard input)
--int-face [<sub-options>]
Count and display interior faces these faces may be selected with face-selection sub-options
-j, --join [<sub-options>]
Join non-conforming faces; select faces to join with face-selection sub-options
--log [<file>]
Redirect terminal output to a file (default file: preprocessor.log)
-p, --perio <sub-options>
Mesh periodicity defined by argument; joining sub-options for tolerances and selection of periodic faces with face-selection sub-options
--reorient
If necessary, correct orientation of cells and faces
--version
Print version number

Postprocessing options

--case <name>
Case name (without this option, the default name is: preprocess)
--cgns [<sub-options>]
CGNS geometry output
--ensight [<sub-options>]
EnSight Gold geometry output
--med [<sub-options>]
MED 2.3 geometry output

Mesh selection sub-options (-m, --mesh)

--format <keyword>
Selection of mesh file format
--num <n>
Selection of mesh number in file (if the format allows it)
--grp-cel <keyword>
Add groups of cells (based on format features/conventions)
  * based on sections: keyword "section"
  * based on zones:    keyword "zone"
--grp-fac <keyword>
Add groups of faces (based on format features/conventions)
  * based on sections: keyword "section"
  * based on zones:    keyword "zone"

Available mesh formats (-m, --mesh; --format)


                                 Extension      Keyword


   CGNS                          .cgns          cgns     
   pro-STAR/STAR4                .ngeom         ngeom    
   EnSight (6 or Gold)           .case          ensight  
   GAMBIT Neutral                .neu           gambit   
   GMSH                          .msh           gmsh     
   NUMECA Hex                    .hex           hex      
   I-deas universal              .unv           unv      
   MED                           .med           med      
   Simail (NOPO)                 .des           des      
   Meta-mesh file                .mesh          meta     

Postprocessing selection sub-options (--cgns, --ensight, --med)

--discard-poly
discard polygonal faces (wth more than 4 edges) or polyhedra
--simple
force mesh output on a single part (EnSight) or section (CGNS)
--text
force text output (EnSight)
--big-endian
force binary output to big-endian (EnSight)
--color-to-group
transform colors to groups (MED)
--volume
activate output of volume mesh (by default if -boundary or -info not given)
--boundary
activate output of boundary mesh (by default if -volume or -info not given)
--info
activate output of information meshes (by default if -volume or -boundary not given)

Periodicity sub-options (-perio, -periodic)

--trans <tx ty tz>
translation vector
--rota --angle <alpha> --dir <dx dy dz> [--invpt <px py pz>]
rotation defined by an angle (in degrees) and a direction vector, and eventually by an invariant point (origin by default)
--rota --matrix <mij> [--invpt <px py pz>]
rotation defined by the rotation matrix (given line by line), and eventually by an invariant point (origin by default)

Non-conformal face joining sub-options (-j, --join, -p, --perio)

--fraction <real number>
fraction of the length of the smallest edge under which we consider that vertices may be fused (default value: 0.1)
--plane <real number>
minimal cosine of the normals of 2 coplanar faces (default value: 0.8)
--semi-conf
fast joining algorithm (allowed if faces already share vertices)

Face selection sub-options (for joining, selection, and periodicity)

--color <number(s)>
color numbers of faces to select
--group <name(s)>
group names of faces to select
--invsel
invert selection

ENVIRONMENT

CS_PREPROCESS_MIN_EDGE_LEN
Length under which an edge is considered degenerate (default: 1.e-15).
CS_PREPROCESS_MEM_LOG
Name of memory operations trace file.
CS_PREPROCESS_IGNORE_IDEAS_COO_SYS
Ignore I-deas coordinate systems.
CS_PREPROCESS_JOIN_MAX_SUB_FACES
Number of new faces of an initial face above which we consider that conformal joining face reconstruction has gone into an infinite loop (default: 100)

SEE ALSO

cs_io_dump(1), cs_partition(1)
Ca me remet en mémoire un vieux truc, qui disait qu'il n'y avait que les
imbéciles qui ne changeaient pas d'avis. C'est d'ailleurs mon avis, et
je ne vois pas pourquoi j'en changerais.
-+- Pierre, sur fr.rec.photo -+-